/* ============================================================
   OpenCode 한국어 가이드 — modern DARK BLUE theme (gradient)
   ============================================================ */

:root{
  color-scheme: dark;

  /* surfaces — deep navy */
  --bg:        #070B16;
  --bg-soft:   #0A1020;
  --surface:   #0E1627;
  --surface-2: #141E36;
  --line:      #1E2A45;
  --line-2:    #2A395C;

  /* ink */
  --ink:    #EAF0FB;
  --ink-2:  #C2CDE4;
  --muted:  #8A97B6;
  --faint:  #5C6A8C;

  /* blue accent (primary) */
  --acc:        #4D8DFF;
  --acc-2:      #38BDF8;   /* cyan  — gradient mid */
  --acc-3:      #7C5CFF;   /* indigo — gradient end */
  --acc-bright: #8FB6FF;   /* legible link/text on dark */
  --acc-soft:   rgba(77,141,255,.13);
  --acc-line:   rgba(77,141,255,.32);
  --acc-ring:   rgba(77,141,255,.40);

  /* gold accent (Hermes) */
  --gold:        #F8B62B;
  --gold-bright: #FFCF66;
  --gold-soft:   rgba(248,182,43,.13);
  --gold-line:   rgba(248,182,43,.32);
  --gold-ring:   rgba(248,182,43,.40);

  /* code panel — darkest */
  --code-bg:  #060A14;
  --code-2:   #0C1322;
  --code-ink: #DCE3F2;
  --code-line:#1B2740;

  /* gradients */
  --grad:      linear-gradient(135deg, #4D8DFF 0%, #6E7BFF 55%, #7C5CFF 100%);
  --grad-soft: linear-gradient(135deg, rgba(77,141,255,.18), rgba(124,92,255,.14));
  --grad-text: linear-gradient(108deg, #8FB6FF 0%, #38BDF8 48%, #9C8BFF 100%);
  --grad-gold: linear-gradient(135deg, #F8B62B, #FF9E45);

  /* shape */
  --r:    14px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 32px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.28);
  --shadow:    0 4px 14px rgba(0,0,0,.40), 0 20px 48px -22px rgba(0,0,0,.65);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.45), 0 50px 90px -34px rgba(0,0,0,.75);
  --glow:      0 0 0 1px var(--acc-line), 0 12px 40px -12px rgba(77,141,255,.45);

  --sidebar-w: 290px;
  --maxw: 880px;

  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:32px; }
body{
  margin:0;
  font-family:var(--sans);
  background:var(--bg);
  color:var(--ink);
  line-height:1.72;
  letter-spacing:-0.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *{ animation:none !important; transition:none !important; }
}

a{ color:var(--acc-bright); text-decoration:none; }
@media (hover:hover) and (pointer:fine){ a:hover{ text-decoration:underline; text-underline-offset:3px; } }
strong,b{ font-weight:700; color:var(--ink); }

/* 한국어 줄바꿈: 단어 중간이 아니라 띄어쓰기 단위로만 끊기게 */
.hero__title, .section__title, .hero__lead, .lead, .subh,
.card h3, .duo__card h3, .step__body h3, .tip h3, .path__main h3,
.os-block__h, .callout p, .faq__item summary, .why__col p,
.card p, .tip p, .path__main > p, .pick p, .pick h4{ word-break:keep-all; }

/* 자연스러운 줄바꿈: 제목은 균형있게, 본문은 외톨이 줄 방지 */
.section__title, .card h3, .duo__card h3, .tip h3, .path__main h3, .step__body h3{ text-wrap:balance; }
.hero__lead, .lead, .callout p, .card p, .tip p, .duo__card > p,
.step__body > p, .path__main > p, .why__col p, .faq__item p, .os-note, .muted, .sidebar__tag, .pick p{ text-wrap:pretty; }

/* 제목 안에서 의미 덩어리는 통째로 — 구(句) 중간에서 줄이 끊기지 않게 */
.hero__title .nb{ white-space:nowrap; }

/* ---------- atmosphere ---------- */
.bg-mesh{
  position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:
    radial-gradient(720px 560px at 10% -8%, rgba(77,141,255,.22), transparent 60%),
    radial-gradient(680px 600px at 100% 4%, rgba(124,92,255,.18), transparent 58%),
    radial-gradient(620px 520px at 50% 108%, rgba(56,189,248,.12), transparent 62%);
}
.bg-mesh::after{
  content:""; position:absolute; inset:0;
  background-image:linear-gradient(var(--line) 1px, transparent 1px),
                   linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(900px 700px at 50% 0%, #000, transparent 75%);
          mask-image:radial-gradient(900px 700px at 50% 0%, #000, transparent 75%);
  opacity:.30;
}
.progress-bar{
  position:fixed; top:0; left:0; height:3px; width:0%; z-index:120;
  background:linear-gradient(90deg, var(--acc), var(--acc-2) 55%, var(--gold));
  box-shadow:0 0 16px rgba(77,141,255,.65);
  transition:width .12s ease-out;
}

/* ---------- brand ---------- */
.brand{ display:flex; align-items:center; gap:11px; color:var(--ink) !important; text-decoration:none; }
.brand:hover{ text-decoration:none; }
.brand__logo{
  width:30px; height:30px; border-radius:9px; flex:0 0 auto; position:relative;
  background:var(--grad);
  box-shadow:0 4px 14px rgba(77,141,255,.5), inset 0 1px 0 rgba(255,255,255,.35);
}
.brand__logo::after{
  content:""; position:absolute; inset:0; margin:auto; width:11px; height:11px;
  border:2.5px solid #fff; border-radius:4px; transform:rotate(45deg);
}
.brand__name{ font-weight:800; font-size:1.06rem; letter-spacing:-0.02em; }
.brand__ko{ color:var(--muted); font-weight:700; }

/* ---------- layout ---------- */
.layout{ display:flex; align-items:flex-start; }

.sidebar{
  position:sticky; top:0; height:100vh; width:var(--sidebar-w); flex:0 0 var(--sidebar-w);
  padding:30px 22px 22px; border-right:1px solid var(--line);
  background:rgba(8,12,24,.72); backdrop-filter:blur(12px);
  display:flex; flex-direction:column; overflow-y:auto;
}
.sidebar__tag{
  margin:16px 4px 22px; font-size:.82rem; line-height:1.6; color:var(--muted);
  padding-bottom:20px; border-bottom:1px solid var(--line);
}

.toc{ display:flex; flex-direction:column; gap:1px; }
.toc__group{
  margin:18px 8px 8px; font-size:.7rem; font-weight:800; letter-spacing:.12em;
  text-transform:uppercase; color:var(--faint);
}
.toc__group:first-child{ margin-top:0; }
.toc__group--gold{ color:var(--gold); }
.toc__link{
  display:flex; align-items:center; gap:11px; padding:8px 12px; border-radius:10px;
  color:var(--ink-2) !important; font-size:.9rem; font-weight:500; text-decoration:none;
  border:1px solid transparent; transition:background .15s, color .15s, border-color .15s;
}
.toc__num{
  font-family:var(--mono); font-size:.72rem; color:var(--faint); font-weight:600;
  width:20px; flex:0 0 auto; transition:color .15s;
}
@media (hover:hover) and (pointer:fine){ .toc__link:hover{ background:var(--surface-2); text-decoration:none; } }
.toc__link.is-active{
  background:var(--acc-soft); color:#fff !important; font-weight:700; border-color:var(--acc-line);
}
.toc__link.is-active .toc__num{ color:var(--acc-bright); }
.toc__link--gold.is-active{
  background:var(--gold-soft); color:#fff !important; border-color:var(--gold-line);
}
.toc__link--gold.is-active .toc__num{ color:var(--gold-bright); }

.sidebar__foot{
  margin-top:auto; padding-top:18px; border-top:1px solid var(--line);
  display:flex; flex-direction:column; gap:8px;
}
.sidebar__foot a{ font-size:.82rem; color:var(--muted) !important; font-weight:600; }
@media (hover:hover) and (pointer:fine){ .sidebar__foot a:hover{ color:var(--acc-bright) !important; text-decoration:none; } }

.content{
  flex:1 1 auto; min-width:0; max-width:calc(var(--maxw) + 140px);
  margin:0 auto; padding:0 clamp(20px,5vw,70px) 80px;
}

/* ---------- mobile bar ---------- */
.mobile-bar{
  display:none; position:sticky; top:0; z-index:90;
  align-items:center; justify-content:space-between;
  padding:13px 18px; background:rgba(8,12,24,.9); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.menu-toggle{
  width:42px; height:38px; display:inline-flex; flex-direction:column; gap:5px;
  align-items:center; justify-content:center; background:var(--surface);
  border:1px solid var(--line-2); border-radius:11px; cursor:pointer;
}
.menu-toggle span{ width:18px; height:2px; background:var(--ink); border-radius:2px; transition:.25s; }
.menu-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero{
  display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:center;
  padding:clamp(48px,8vw,96px) 0 64px; position:relative;
}
.pill{
  display:inline-flex; align-items:center; gap:9px; margin:0 0 22px;
  padding:7px 15px; border-radius:999px; background:var(--surface);
  border:1px solid var(--line-2); box-shadow:var(--shadow-sm);
  font-size:.78rem; font-weight:600; color:var(--ink-2);
}
.pill__dot{ width:8px; height:8px; border-radius:50%; background:var(--acc); box-shadow:0 0 0 4px var(--acc-soft), 0 0 10px var(--acc); }
.hero__title{
  margin:0 0 22px; font-size:clamp(2.15rem,4.4vw,3.15rem); line-height:1.18;
  font-weight:800; letter-spacing:-0.035em; text-wrap:balance;
}
.grad{
  background:var(--grad-text);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.byline{
  display:inline-flex; align-items:center; gap:11px; margin:-2px 0 24px;
  font-size:.95rem; color:var(--muted);
}
.byline__avatar{
  width:28px; height:28px; border-radius:50%; flex:0 0 auto;
  display:inline-flex; align-items:center; justify-content:center;
  font-size:.8rem; font-weight:800; color:#fff; background:var(--grad);
  box-shadow:0 4px 12px rgba(77,141,255,.5), inset 0 1px 0 rgba(255,255,255,.3);
}
/* 무지개 글로우 이름 (동적 — 그라데이션이 계속 흐름) */
.byline strong, .footer__copy strong{
  font-weight:800; white-space:nowrap;
  background-image:linear-gradient(90deg,#ff6b81,#ffb347,#ffe14d,#3ce88f,#4d8dff,#b07bff,#ff6b81);
  background-size:200% auto;
  -webkit-background-clip:text; background-clip:text;
  color:transparent; -webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 7px rgba(130,170,255,.4));
  animation:rainbow-flow 6s linear infinite;
}
@keyframes rainbow-flow{ to{ background-position:200% center; } }

.byline__tag{
  font-style:normal; font-weight:600; color:var(--muted);
}

.hero__lead{ margin:0 0 30px; font-size:1.1rem; color:var(--ink-2); max-width:36em; }
.hero__cta{ display:flex; flex-wrap:wrap; gap:13px; margin-bottom:40px; }

.btn{
  display:inline-flex; align-items:center; gap:9px; padding:13px 24px; border-radius:13px;
  font-weight:700; font-size:.96rem; cursor:pointer; border:1px solid transparent;
  transition:transform .18s, box-shadow .18s, background .18s, border-color .18s; text-decoration:none;
}
.btn--primary{ background:var(--grad); color:#fff !important; box-shadow:0 12px 28px -8px rgba(77,141,255,.6); }
.btn__arrow{ transition:transform .2s; }
.btn--ghost{ background:var(--surface); color:var(--ink) !important; border-color:var(--line-2); box-shadow:var(--shadow-sm); }
@media (hover:hover) and (pointer:fine){
  .btn:hover{ text-decoration:none; transform:translateY(-2px); }
  .btn--primary:hover{ box-shadow:0 18px 38px -10px rgba(77,141,255,.7); }
  .btn--primary:hover .btn__arrow{ transform:translateX(4px); }
  .btn--ghost:hover{ border-color:var(--acc); color:var(--acc-bright) !important; }
}

.hero__stats{ list-style:none; margin:0; padding:0; display:flex; gap:14px; flex-wrap:wrap; }
.hero__stats li{
  display:flex; flex-direction:column; padding:12px 18px; border-radius:var(--r);
  background:var(--surface); border:1px solid var(--line); box-shadow:var(--shadow-sm); min-width:108px;
  position:relative; overflow:hidden;
}
.hero__stats li::before{
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px; background:var(--grad);
}
.hero__stats b{
  font-size:1.42rem; font-weight:800; letter-spacing:-0.03em;
  background:var(--grad-text); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero__stats span{ font-size:.76rem; color:var(--muted); margin-top:2px; }

/* hero visual mock */
.hero__visual{ position:relative; }
.mock{
  position:relative; z-index:2; background:var(--surface);
  border:1px solid var(--line-2); border-radius:var(--r-lg); box-shadow:var(--shadow-lg);
  overflow:hidden; transform:rotate(1.2deg); transition:transform .4s ease;
}
.mock::before{
  content:""; position:absolute; inset:0; border-radius:inherit; pointer-events:none;
  padding:1px; background:linear-gradient(150deg, rgba(77,141,255,.55), transparent 45%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude;
}
@media (hover:hover) and (pointer:fine){ .hero__visual:hover .mock{ transform:rotate(0deg) translateY(-3px); } }
.mock__head{
  display:flex; align-items:center; gap:10px; padding:14px 18px;
  border-bottom:1px solid var(--line); background:var(--surface-2);
}
.mock__avatar{
  width:24px; height:24px; border-radius:7px; background:var(--grad);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.4);
}
.mock__title{ font-weight:800; font-size:.92rem; }
.mock__badge{
  margin-left:auto; font-family:var(--mono); font-size:.68rem; font-weight:600;
  color:var(--acc-bright); background:var(--acc-soft); padding:3px 9px; border-radius:7px;
}
.mock__body{ padding:18px; display:flex; flex-direction:column; gap:13px; }
.bubble{ border-radius:14px; padding:11px 15px; font-size:.9rem; line-height:1.6; }
.bubble--you{ align-self:flex-end; background:var(--grad); color:#fff; border-bottom-right-radius:5px; max-width:88%; box-shadow:0 8px 20px -8px rgba(77,141,255,.6); }
.bubble--ai{ align-self:flex-start; background:var(--surface-2); border:1px solid var(--line); border-bottom-left-radius:5px; max-width:96%; color:var(--ink-2); }
.bubble--ai p{ margin:0 0 9px; }
.diff{ list-style:none; margin:0 0 11px; padding:10px 12px; border-radius:10px; background:var(--code-bg); border:1px solid var(--code-line); display:flex; flex-direction:column; gap:5px; }
.diff li{ font-family:var(--mono); font-size:.76rem; color:var(--code-ink); display:flex; gap:8px; align-items:center; }
.diff span{ font-weight:700; width:12px; }
.diff--add span{ color:#4ad6a4; }
.diff--add{ color:#bdeedd; }
.diff--mod span{ color:#f3b65f; }
.diff--mod{ color:#f0d8b0; }
.done-chip{
  display:inline-flex; align-items:center; gap:6px; font-size:.78rem; font-weight:700;
  color:var(--acc-bright); background:var(--acc-soft); padding:5px 12px; border-radius:999px; border:1px solid var(--acc-line);
}
.mock-glow{
  position:absolute; inset:-40px -30px -50px; z-index:1; border-radius:50%;
  background:radial-gradient(closest-side, rgba(77,141,255,.30), rgba(124,92,255,.12), transparent 72%);
  filter:blur(12px);
}
.float-tag{
  position:absolute; z-index:3; font-size:.76rem; font-weight:700; padding:8px 13px;
  border-radius:11px; background:var(--surface); border:1px solid var(--line-2);
  box-shadow:var(--shadow); white-space:nowrap;
}
.float-tag--1{ top:-16px; left:-26px; color:var(--acc-bright); }
.float-tag--1::before{ content:"●"; color:var(--acc); margin-right:7px; font-size:.6rem; vertical-align:middle; }
.float-tag--2{ bottom:18px; right:-22px; color:var(--gold-bright); }
.float-tag--2::before{ content:"⇄"; margin-right:7px; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section{ max-width:var(--maxw); margin:0 auto; padding:54px 0; border-top:1px solid var(--line); }
.section:first-of-type{ border-top:none; }
.kicker{
  display:inline-block; margin:0 0 14px; font-family:var(--mono); font-size:.78rem;
  font-weight:600; letter-spacing:.04em; color:var(--acc-bright);
  background:var(--acc-soft); padding:5px 12px; border-radius:8px; border:1px solid var(--acc-line);
}
.kicker--gold{ color:var(--gold-bright); background:var(--gold-soft); border-color:var(--gold-line); }
.section__title{
  margin:0 0 18px; font-size:clamp(1.7rem,3.4vw,2.3rem); line-height:1.2;
  font-weight:800; letter-spacing:-0.03em;
}
.lead{ font-size:1.06rem; color:var(--ink-2); margin:0 0 28px; max-width:42em; }
.muted{ color:var(--muted); font-size:.92rem; }
.subh{
  margin:42px 0 16px; font-size:1.18rem; font-weight:800; letter-spacing:-0.02em;
  display:flex; align-items:baseline; gap:12px; flex-wrap:wrap;
}
.subh__hint{ font-size:.82rem; font-weight:500; color:var(--muted); }

/* inline code + kbd */
code{
  font-family:var(--mono); font-size:.86em; background:var(--acc-soft);
  border:1px solid var(--acc-line); padding:1.5px 6px; border-radius:6px; color:#A8C8FF;
  white-space:nowrap;
}
.section--gold code{ color:var(--gold-bright); background:var(--gold-soft); border-color:var(--gold-line); }
.kbd{
  display:inline-block; font-family:var(--mono); font-size:.76em; font-weight:600;
  background:var(--surface-2); border:1px solid var(--line-2); border-bottom-width:2px;
  padding:2px 7px; border-radius:7px; color:var(--ink); box-shadow:var(--shadow-sm);
  white-space:nowrap;
}

/* ---------- cards ---------- */
.cards{ display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin:8px 0 28px; }
.card{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-md);
  padding:24px; box-shadow:var(--shadow-sm); transition:transform .2s, box-shadow .2s, border-color .2s;
}
@media (hover:hover) and (pointer:fine){ .card:hover{ transform:translateY(-4px); box-shadow:var(--shadow); border-color:var(--acc-line); } }
.card__ico{ font-size:1.7rem; display:block; margin-bottom:12px; }
.card h3{ margin:0 0 8px; font-size:1.08rem; font-weight:800; letter-spacing:-0.02em; }
.card p{ margin:0; font-size:.92rem; color:var(--muted); }

/* ---------- callouts ---------- */
.callout{
  display:flex; gap:14px; align-items:flex-start; margin:26px 0;
  padding:17px 20px; border-radius:var(--r-md); background:var(--surface);
  border:1px solid var(--line); border-left:4px solid var(--faint); box-shadow:var(--shadow-sm);
}
.callout p{ margin:0; font-size:.93rem; color:var(--ink-2); }
.callout__label{
  flex:0 0 auto; font-size:.72rem; font-weight:800; letter-spacing:.04em;
  padding:3px 10px; border-radius:7px; margin-top:1px;
}
.callout--info{ border-left-color:var(--acc-2); background:linear-gradient(120deg, rgba(56,189,248,.10), var(--surface) 60%); }
.callout--info .callout__label{ background:rgba(56,189,248,.16); color:#7fd8ff; }
.callout--tip{ border-left-color:var(--acc); background:linear-gradient(120deg, var(--acc-soft), var(--surface) 60%); }
.callout--tip .callout__label{ background:var(--acc-soft); color:var(--acc-bright); }
.callout--warn{ border-left-color:var(--gold); background:linear-gradient(120deg, rgba(248,182,43,.10), var(--surface) 60%); }
.callout--warn .callout__label{ background:rgba(248,182,43,.16); color:var(--gold-bright); }
.callout--gold{ border-left-color:var(--gold); background:linear-gradient(120deg, var(--gold-soft), var(--surface) 60%); }
.callout--gold .callout__label{ background:var(--gold-soft); color:var(--gold-bright); }

/* ---------- code blocks ---------- */
.code{
  position:relative; margin:18px 0; border-radius:var(--r-md); overflow:hidden;
  background:var(--code-bg); border:1px solid var(--code-line); box-shadow:var(--shadow);
}
.code::after{
  content:""; position:absolute; left:0; right:0; top:0; height:1px;
  background:linear-gradient(90deg, transparent, var(--acc-line) 30%, var(--acc-line) 70%, transparent);
  opacity:.7;
}
.code--gold::after{ background:linear-gradient(90deg, transparent, var(--gold-line) 30%, var(--gold-line) 70%, transparent); }
.code::before{
  content:attr(data-lang); position:absolute; top:0; left:0;
  font-family:var(--mono); font-size:.68rem; font-weight:600; letter-spacing:.04em;
  color:#8C9BBF; background:var(--code-2); padding:6px 13px;
  border-bottom-right-radius:11px; border-bottom:1px solid var(--code-line); border-right:1px solid var(--code-line);
}
.code pre{
  margin:0; padding:40px 18px 18px; overflow-x:auto;
  font-family:var(--mono); font-size:.85rem; line-height:1.7; color:var(--code-ink);
}
.code code{ background:none; border:none; padding:0; color:inherit; white-space:pre; font-size:inherit; border-radius:0; }
.copy{
  position:absolute; top:7px; right:8px; z-index:3;
  font-family:var(--sans); font-size:.72rem; font-weight:700; cursor:pointer;
  color:#AEB9D4; background:rgba(255,255,255,.06); border:1px solid var(--code-line);
  padding:5px 11px; border-radius:8px; transition:.16s;
}
@media (hover:hover) and (pointer:fine){ .copy:hover{ background:rgba(77,141,255,.2); color:#fff; border-color:var(--acc-line); } }
.copy.copied{ color:#4ad6a4; border-color:#27604f; background:rgba(74,214,164,.14); }
/* bilingual copy label: swap idle ↔ "copied" via class, KO/EN handled by the i18n rules */
.copy__t--done{ display:none; }
.copy.copied .copy__t{ display:none; }
.copy.copied .copy__t--done{ display:inline; }
/* syntax */
.c-c{ color:#6b7a9c; font-style:italic; }   /* comment */
.c-k{ color:#7cc6ff; }                        /* json key */
.c-s{ color:#9fe7c4; }                        /* string */
.code--gold::before{ color:#c8a87a; }
.code--gold .copy.copied{ color:var(--gold-bright); border-color:#6b5530; background:rgba(248,182,43,.14); }

/* ---------- OS grid ---------- */
.os-grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.os-block{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-md);
  padding:20px; box-shadow:var(--shadow-sm);
  min-width:0; /* allow grid track to shrink so long code URLs scroll inside the box instead of overflowing the page */
}
.os-block__h{ margin:0 0 6px; font-size:1.05rem; font-weight:800; display:flex; align-items:center; gap:9px; }
.os-ico{ font-size:1.15rem; }
.os-note{ margin:0; font-size:.84rem; color:var(--muted); }
.os-block .code{ margin-bottom:0; }

/* ---------- steps ---------- */
.steps{ list-style:none; margin:14px 0 0; padding:0; position:relative; }
.steps::before{
  content:""; position:absolute; left:17px; top:14px; bottom:24px; width:2px;
  background:linear-gradient(var(--acc-line), transparent);
}
.steps--gold::before{ background:linear-gradient(var(--gold-line), transparent); }
.step{ display:flex; gap:18px; padding-bottom:14px; position:relative; }
.step__n{
  flex:0 0 auto; width:36px; height:36px; border-radius:50%; z-index:1;
  display:flex; align-items:center; justify-content:center; font-weight:800; font-size:.95rem;
  background:var(--grad); color:#fff; box-shadow:0 6px 16px -4px rgba(77,141,255,.6);
}
.steps--gold .step__n{ background:var(--grad-gold); color:#1a1206; box-shadow:0 6px 16px -4px rgba(248,182,43,.55); }
.step__body{ flex:1 1 auto; min-width:0; padding-top:3px; }
.step__body h3{ margin:0 0 6px; font-size:1.08rem; font-weight:800; letter-spacing:-0.02em; }
.step__body > p{ margin:0 0 6px; color:var(--ink-2); font-size:.95rem; }

/* ---------- path (free models) ---------- */
.path{
  display:flex; gap:18px; margin:18px 0; padding:22px; border-radius:var(--r-lg);
  background:var(--surface); border:1px solid var(--line); box-shadow:var(--shadow-sm);
}
.path__badge{
  flex:0 0 auto; width:44px; height:44px; border-radius:13px;
  display:flex; align-items:center; justify-content:center; font-weight:800; font-size:1.25rem;
  background:var(--acc-soft); color:var(--acc-bright); border:1px solid var(--acc-line);
}
.path__badge--alt{ background:rgba(124,92,255,.14); color:#b3a4ff; border-color:rgba(124,92,255,.32); }
.path__main{ flex:1 1 auto; min-width:0; }
.path__main h3{ margin:0 0 8px; font-size:1.14rem; font-weight:800; letter-spacing:-0.02em; }
.path__main > p{ margin:0 0 6px; color:var(--ink-2); font-size:.95rem; }
.path .code{ margin-bottom:8px; }

/* ---------- kv table ---------- */
.kv-table{ display:grid; grid-template-columns:1fr; gap:8px; margin:14px 0 8px; }
.kv-table--2col{ grid-template-columns:1fr 1fr; }
.kv{
  display:flex; align-items:center; gap:14px; padding:11px 16px; border-radius:11px;
  background:var(--surface); border:1px solid var(--line);
}
.kv__k{ flex:0 0 auto; min-width:120px; display:flex; align-items:center; gap:5px; }
.kv__v{ font-size:.9rem; color:var(--ink-2); }

/* ---------- cmd table ---------- */
.cmd-table{
  margin:8px 0 8px; border:1px solid var(--line); border-radius:var(--r-md);
  overflow:hidden; background:var(--surface); box-shadow:var(--shadow-sm);
}
.cmd-row{ display:grid; grid-template-columns:minmax(170px,1fr) 1.4fr; gap:14px; padding:12px 18px; border-top:1px solid var(--line); align-items:center; }
.cmd-row:first-child{ border-top:none; }
.cmd-row span:last-child{ font-size:.9rem; color:var(--ink-2); }
.cmd-row--head{ background:var(--surface-2); font-weight:800; font-size:.82rem; letter-spacing:.02em; color:var(--muted); }
.cmd-row--head span:last-child{ color:var(--muted); font-weight:800; }
.cmd-table--gold .cmd-row--head{ background:rgba(248,182,43,.1); }

/* ---------- chips ---------- */
.chips{ display:flex; flex-wrap:wrap; gap:9px; margin:8px 0; }
.chip{
  display:inline-flex; align-items:center; gap:7px; padding:8px 13px; border-radius:11px;
  background:var(--surface); border:1px solid var(--line); font-size:.84rem; color:var(--ink-2);
  box-shadow:var(--shadow-sm); transition:transform .15s, border-color .15s;
}
@media (hover:hover) and (pointer:fine){ .chip:hover{ transform:translateY(-2px); border-color:var(--acc-line); } }

/* ---------- duo (agents) ---------- */
.duo{ display:grid; grid-template-columns:1fr 1fr; gap:18px; margin:10px 0; }
.duo__card{ padding:24px; border-radius:var(--r-lg); border:1px solid var(--line); background:var(--surface); box-shadow:var(--shadow-sm); }
.duo__card--plan{ background:linear-gradient(180deg, rgba(56,189,248,.1), var(--surface)); border-color:rgba(56,189,248,.28); }
.duo__card--build{ background:linear-gradient(180deg, var(--acc-soft), var(--surface)); border-color:var(--acc-line); }
.duo__tag{ display:inline-block; font-size:.7rem; font-weight:800; letter-spacing:.05em; padding:3px 10px; border-radius:7px; margin-bottom:10px; }
.duo__card--plan .duo__tag{ background:rgba(56,189,248,.16); color:#7fd8ff; }
.duo__card--build .duo__tag{ background:var(--acc-soft); color:var(--acc-bright); }
.duo__card h3{ margin:0 0 9px; font-size:1.3rem; font-weight:800; letter-spacing:-0.02em; }
.duo__card > p{ margin:0 0 12px; font-size:.93rem; color:var(--ink-2); }
.duo__card ul{ margin:0; padding-left:18px; display:flex; flex-direction:column; gap:5px; }
.duo__card li{ font-size:.88rem; color:var(--muted); }

/* ---------- tips ---------- */
.tips-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.tip{
  position:relative; padding:24px 22px 22px; border-radius:var(--r-md);
  background:var(--surface); border:1px solid var(--line); box-shadow:var(--shadow-sm);
  transition:transform .2s, box-shadow .2s, border-color .2s;
}
@media (hover:hover) and (pointer:fine){ .tip:hover{ transform:translateY(-4px); box-shadow:var(--shadow); border-color:var(--acc-line); } }
.tip__n{
  font-family:var(--mono); font-size:.78rem; font-weight:700; color:var(--acc-bright);
  background:var(--acc-soft); padding:3px 9px; border-radius:7px; border:1px solid var(--acc-line);
}
.tip h3{ margin:14px 0 7px; font-size:1.02rem; font-weight:800; letter-spacing:-0.02em; }
.tip p{ margin:0; font-size:.88rem; color:var(--muted); }

/* ---------- divider ---------- */
.divider{ display:flex; align-items:center; justify-content:center; margin:60px 0 12px; padding-top:48px; border-top:1px dashed var(--line-2); }
.divider__label{
  font-size:.82rem; font-weight:800; letter-spacing:.06em; color:var(--gold-bright);
  background:var(--gold-soft); border:1px solid var(--gold-line); padding:9px 20px; border-radius:999px;
}

.section--gold .step .step__body code{ color:var(--gold-bright); }

/* ---------- why (codex) ---------- */
.why{ display:grid; grid-template-columns:1fr auto 1fr; gap:16px; align-items:center; margin:14px 0; }
.why__col{ padding:22px; border-radius:var(--r-lg); border:1px solid var(--line); box-shadow:var(--shadow-sm); }
.why__col--bad{ background:linear-gradient(180deg, rgba(239,99,99,.08), var(--surface)); border-color:rgba(239,99,99,.24); }
.why__col--good{ background:linear-gradient(180deg, var(--gold-soft), var(--surface)); border-color:var(--gold-line); }
.why__cap{ display:block; font-weight:800; font-size:1.04rem; margin-bottom:8px; }
.why__col p{ margin:0; font-size:.9rem; color:var(--ink-2); }
.why__arrow{ font-size:1.6rem; color:var(--gold); font-weight:800; }

/* ---------- faq ---------- */
.faq{ display:flex; flex-direction:column; gap:10px; margin-top:8px; }
.faq__item{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-md);
  padding:2px 20px; box-shadow:var(--shadow-sm); transition:border-color .2s;
}
.faq__item[open]{ border-color:var(--acc-line); }
.faq__item summary{
  list-style:none; cursor:pointer; padding:16px 0; font-weight:700; font-size:1rem;
  display:flex; align-items:center; justify-content:space-between; gap:12px;
}
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary::after{
  content:"+"; flex:0 0 auto; width:26px; height:26px; border-radius:8px;
  display:flex; align-items:center; justify-content:center; font-weight:700; font-size:1.15rem;
  background:var(--surface-2); border:1px solid var(--line-2); color:var(--muted); transition:.2s;
}
.faq__item[open] summary::after{ content:"−"; background:var(--acc-soft); color:var(--acc-bright); border-color:var(--acc-line); transform:rotate(180deg); }
.faq__item p{ margin:0 0 18px; color:var(--ink-2); font-size:.93rem; }

/* ---------- footer ---------- */
.footer{ max-width:var(--maxw); margin:40px auto 0; padding:40px 0 10px; border-top:1px solid var(--line); }
.footer__brand{ display:flex; align-items:center; gap:10px; font-weight:800; font-size:1.05rem; margin-bottom:12px; }
.footer__disc{ margin:0 0 18px; font-size:.86rem; color:var(--muted); max-width:48em; }
.footer__links{ display:flex; flex-wrap:wrap; gap:18px; margin-bottom:18px; }
.footer__links a{ font-size:.88rem; font-weight:600; color:var(--ink-2) !important; }
@media (hover:hover) and (pointer:fine){ .footer__links a:hover{ color:var(--acc-bright) !important; text-decoration:none; } }
.footer__copy{ margin:0; font-size:.8rem; color:var(--muted); }
.footer__copy a{ color:var(--acc-bright); text-decoration:underline; text-underline-offset:2px; }
@media (hover:hover) and (pointer:fine){ .footer__copy a:hover{ color:#fff; } }

/* ---------- to top ---------- */
.to-top{
  position:fixed; right:22px; bottom:22px; z-index:80; width:46px; height:46px; border-radius:14px;
  background:var(--grad); color:#fff; border:none; cursor:pointer; font-size:1.2rem;
  box-shadow:0 10px 26px -8px rgba(77,141,255,.6); opacity:0; transform:translateY(14px) scale(.9); pointer-events:none;
  transition:.25s;
}
.to-top.show{ opacity:1; transform:none; pointer-events:auto; }
@media (hover:hover) and (pointer:fine){ .to-top:hover{ box-shadow:0 16px 34px -8px rgba(77,141,255,.75); } }

/* ---------- reveal anim ---------- */
.js .reveal{ opacity:0; transform:translateY(18px); }
.js .reveal.in{ opacity:1; transform:none; transition:opacity .6s cubic-bezier(.2,.7,.2,1), transform .6s cubic-bezier(.2,.7,.2,1); }
.hero .reveal:nth-child(1){ transition-delay:.02s; }
.hero .reveal:nth-child(2){ transition-delay:.08s; }
.hero .reveal:nth-child(3){ transition-delay:.14s; }
.hero .reveal:nth-child(4){ transition-delay:.20s; }
.hero .reveal:nth-child(5){ transition-delay:.26s; }
.hero__visual.reveal{ transition-delay:.18s; }

/* ---------- scrollbar ---------- */
::-webkit-scrollbar{ width:11px; height:11px; }
::-webkit-scrollbar-track{ background:var(--bg); }
::-webkit-scrollbar-thumb{ background:var(--line-2); border-radius:8px; border:3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover{ background:#34466e; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .hero{ grid-template-columns:1fr; gap:36px; }
  .hero__visual{ max-width:440px; margin:0 auto; }
  .float-tag--1{ left:0; }
  .float-tag--2{ right:0; }
}
@media (max-width:860px){
  .mobile-bar{ display:flex; }
  .sidebar{
    position:fixed; top:0; left:0; z-index:100; height:100vh; height:100dvh; width:min(320px,86vw);
    transform:translateX(-104%); transition:transform .3s cubic-bezier(.4,.1,.2,1);
    box-shadow:var(--shadow-lg); background:var(--bg);
  }
  .sidebar.open{ transform:none; }
  .content{ padding:0 22px 70px; }
  .cards{ grid-template-columns:1fr 1fr; }
  .os-grid,.duo,.why{ grid-template-columns:1fr; }
  .why__arrow{ transform:rotate(90deg); justify-self:center; }
  .tips-grid{ grid-template-columns:1fr 1fr; }
  .kv-table--2col{ grid-template-columns:1fr; }
}
@media (max-width:560px){
  .hero__title{ font-size:2.05rem; }
  .cards,.tips-grid{ grid-template-columns:1fr; }
  .cmd-row{ grid-template-columns:1fr; gap:5px; }
  .cmd-row--head{ display:none; }
  .hero__stats li{ flex:1 1 40%; }
  .section{ padding:42px 0; }
  .path{ flex-direction:column; gap:12px; }
  .step{ gap:13px; }
  code{ white-space:normal; word-break:break-word; }
}

body.nav-open{ overflow:hidden; }

/* ============================================================
   ✦ CLEAN MINIMAL TOUCHES (static — no looping animation)
   ============================================================ */
/* HUD-ish kicker marker, no glow/animation */
.kicker::before{ content:"◇ "; color:var(--acc); opacity:.85; }
.kicker--gold::before{ color:var(--gold); }

/* keep the cursor-glow variables harmless if referenced */
.hero{ isolation:isolate; }
.hero__copy, .hero__visual{ position:relative; z-index:1; }

/* ============================================================
   📱 MOBILE OPTIMIZATION — intuitive · modern · polished
   ============================================================ */
html{ -webkit-text-size-adjust:100%; }
*{ -webkit-tap-highlight-color:rgba(77,141,255,.16); }
a, button, summary, .toc__link, .btn, .copy, .chip{ touch-action:manipulation; }
.code pre{ -webkit-overflow-scrolling:touch; }
/* tactile press feedback for touch — replaces the hover affordance that no longer fires on tap */
.btn:active{ transform:translateY(0) scale(.985); }
.copy:active{ transform:scale(.94); }
.toc__link:active{ background:var(--surface-2); }
.to-top:active{ transform:scale(.92); }
.faq__item summary:active{ opacity:.8; }

/* dim scrim behind the drawer */
.nav-scrim{
  position:fixed; inset:0; z-index:95; background:rgba(4,7,16,.6);
  -webkit-backdrop-filter:blur(2px); backdrop-filter:blur(2px);
  opacity:0; pointer-events:none; transition:opacity .28s ease;
}
body.nav-open .nav-scrim{ opacity:1; pointer-events:auto; }
@media (min-width:861px){ .nav-scrim{ display:none !important; } }

/* fixed chrome respects notches / safe areas */
.mobile-bar{
  padding-top:calc(12px + env(safe-area-inset-top));
  padding-left:calc(18px + env(safe-area-inset-left));
  padding-right:calc(14px + env(safe-area-inset-right));
  box-shadow:0 6px 20px -16px rgba(0,0,0,.9);
}
.menu-toggle{ width:44px; height:42px; }

@media (max-width:860px){
  html{ scroll-padding-top:76px; }
  .sidebar{
    width:min(335px,90vw); border-radius:0 20px 20px 0; overscroll-behavior:contain;
    padding-top:calc(22px + env(safe-area-inset-top));
    padding-left:calc(20px + env(safe-area-inset-left));
    padding-bottom:calc(22px + env(safe-area-inset-bottom));
  }
  .toc__link{ padding:12px 12px; font-size:.96rem; border-radius:12px; }
  .toc__group{ margin-top:20px; }
  .sidebar__foot a{ padding:6px 0; }
  .to-top{
    width:48px; height:48px;
    right:calc(16px + env(safe-area-inset-right));
    bottom:calc(16px + env(safe-area-inset-bottom));
  }
  body.nav-open .to-top{ opacity:0 !important; pointer-events:none; }
}

@media (max-width:760px){
  .content{
    padding-left:max(18px, env(safe-area-inset-left));
    padding-right:max(18px, env(safe-area-inset-right));
    padding-bottom:64px;
  }
  .hero{ padding-top:28px; padding-bottom:32px; gap:28px; }
  .hero__title{ font-size:clamp(2rem, 8.4vw, 2.55rem); margin-bottom:18px; }
  .hero__lead{ font-size:1.02rem; margin-bottom:24px; }
  .pill{ margin-bottom:18px; }
  .section{ padding:36px 0; }
  .section__title{ font-size:clamp(1.5rem, 6.2vw, 1.95rem); }
  .subh{ margin-top:32px; font-size:1.08rem; }
  .lead{ font-size:1rem; }
}

@media (max-width:560px){
  /* full-width, thumb-friendly CTAs */
  .hero__cta{ flex-direction:column; align-items:stretch; gap:10px; width:100%; }
  .hero__cta .btn{ width:100%; justify-content:center; padding:15px 22px; font-size:1rem; }

  /* compact 3-up stats */
  .hero__stats{ gap:8px; }
  .hero__stats li{ flex:1 1 0; min-width:0; padding:11px 10px; }
  .hero__stats li::before{ width:3px; }
  .hero__stats b{ font-size:1.18rem; }
  .hero__stats span{ font-size:.66rem; }

  /* hide decorative chat mock on phones → guide starts sooner */
  .hero__visual{ display:none; }

  /* code: comfortable, no cramped wrap */
  .code pre{ font-size:.8rem; padding:36px 14px 15px; }
  .code::before{ font-size:.64rem; padding:5px 11px; }
  .copy{ padding:7px 13px; font-size:.72rem; }

  /* roomier tap targets */
  .faq__item{ padding:2px 16px; }
  .faq__item summary{ padding:16px 0; font-size:.96rem; }
  .faq__item summary::after{ width:28px; height:28px; }
  .chip{ padding:10px 13px; }
  .kv{ padding:12px 14px; }
  .step__n{ width:32px; height:32px; font-size:.9rem; }
  .steps::before{ left:15px; }

  /* tighten panels */
  .card{ padding:20px; }
  .path{ padding:18px; }
  .duo__card{ padding:20px; }
  .callout{ padding:15px 16px; gap:11px; }
  .byline{ font-size:.9rem; gap:9px; }
  .footer__links{ gap:12px 16px; }

  /* never let wide inline code force a sideways scroll */
  code{ white-space:normal; word-break:break-word; overflow-wrap:anywhere; }
  .kbd{ white-space:nowrap; }
}

/* very small phones */
@media (max-width:380px){
  .hero__title{ font-size:1.86rem; }
  .hero__stats li{ flex:1 1 46%; }
  .content{ padding-left:16px; padding-right:16px; }
}

/* ============================================================
   📊 CLI 비교 (가격 & 모델)
   ============================================================ */
.divider__label--blue{ color:var(--acc-bright); background:var(--acc-soft); border-color:var(--acc-line); }

.cmp-wrap{
  overflow-x:auto; -webkit-overflow-scrolling:touch; margin:6px 0 24px;
  border:1px solid var(--line); border-radius:var(--r-md); box-shadow:var(--shadow-sm);
}
.cmp{ width:100%; border-collapse:collapse; font-size:.92rem; min-width:540px; background:var(--surface); }
.cmp th, .cmp td{ text-align:left; padding:13px 16px; border-top:1px solid var(--line); vertical-align:middle; }
.cmp thead th{
  background:var(--surface-2); color:var(--muted); font-weight:800; font-size:.78rem;
  letter-spacing:.02em; border-top:none; white-space:nowrap;
}
.cmp td{ color:var(--ink-2); }
@media (hover:hover) and (pointer:fine){ .cmp tbody tr:hover{ background:var(--surface-2); } }
.tag-free{
  display:inline-block; font-size:.74rem; font-weight:800; color:var(--acc-bright);
  background:var(--acc-soft); border:1px solid var(--acc-line); padding:2px 9px; border-radius:999px;
}

.tools{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.tool{
  background:var(--surface); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:22px; box-shadow:var(--shadow-sm); transition:transform .2s, border-color .2s;
}
@media (hover:hover) and (pointer:fine){ .tool:hover{ transform:translateY(-3px); border-color:var(--acc-line); } }
.tool__name{ margin:0 0 11px; font-size:1.16rem; font-weight:800; letter-spacing:-0.02em; display:flex; align-items:baseline; gap:9px; flex-wrap:wrap; }
.tool__by{ font-size:.74rem; font-weight:600; color:var(--muted); }
.tool__models{ margin:0 0 13px; padding-bottom:13px; font-size:.9rem; color:var(--ink-2); border-bottom:1px solid var(--line); }
.plan-list{ list-style:none; margin:0 0 13px; padding:0; display:flex; flex-direction:column; gap:8px; }
.plan-list li{ position:relative; padding-left:18px; font-size:.9rem; color:var(--ink-2); }
.plan-list li::before{ content:"›"; position:absolute; left:2px; top:-1px; color:var(--acc); font-weight:800; font-size:1.05rem; }
.tool__note{ margin:0; font-size:.84rem; color:var(--muted); }

@media (max-width:760px){ .tools{ grid-template-columns:1fr; } }

/* ============================================================
   THEMED ICONS (assets/icons) — color follows context via currentColor
   ============================================================ */
.card__ico{ color:var(--acc-bright); }
.section--gold .card__ico{ color:var(--gold-bright); }

.os-block__h .ico{ color:var(--acc-bright); font-size:1.12rem; vertical-align:-0.16em; }
.os-block--gold .os-block__h .ico{ color:var(--gold-bright); }

.kicker .ico{ font-size:1rem; vertical-align:-0.18em; }
.done-chip .ico{ font-size:1.05em; }
.toc__num .ico{ font-size:1.04rem; }            /* toc icon inherits faint → accent when .is-active */
.pick__badge .ico{ font-size:1.18em; vertical-align:-0.22em; }

.tool__name .ico{ font-size:1.04em; vertical-align:-0.16em; }
.tool__name .ico--spark{ color:#9C8BFF; }       /* Claude  */
.tool__name .ico--code{ color:#38BDF8; }        /* Codex   */
.tool__name .ico--orbit{ color:#5B9BFF; }       /* Antigravity */
.tool__name .ico--terminal{ color:#AEB9D4; }    /* OpenCode */